This full build kit combines a KAK Industry 11.5 inch 223 Wylde barrel with a Magpul BTR brace and ACE 20 Series M Lok handguard. The 223 Wylde chamber handles both 223 Remington and 5.56 NATO ammunition, while the carbine gas system provides reliable cycling in this compact configuration. The 10 inch freefloat handguard maximizes accessory mounting space, and the 7075 T6 aluminum upper receiver features M4 feed ramps for dependable feeding.
The 223 Wylde chamber offers crossover compatibility between 223 Remington and 5.56 NATO while maintaining match grade throat dimensions. The 1:8 twist rate stabilizes bullet weights from 55 grain to 77 grain effectively. Carbine length gas in an 11.5 inch barrel delivers dependable cycling with manageable recoil impulse, making this combination work well for compact builds without sacrificing gas system reliability.
The Magpul BTR brace mounts to standard mil spec buffer tubes and provides adjustment for different shooting positions. The ACE 20 Series 10 inch M Lok handguard extends nearly to the muzzle device, offering full length accessory mounting without adding bulk. Freefloat design isolates the barrel from external pressure, helping maintain consistent point of impact when lights, grips, or other accessories are added.
The government profile barrel concentrates material at the chamber and gas port area where stress is highest while reducing weight toward the muzzle. This distribution balances durability with handling characteristics in shorter barrels. The 7075 T6 aluminum upper receiver with M4 feed ramps ensures reliable feeding across different ammunition types, and the anodized finish provides corrosion resistance through extended use.
Lower receiver not included
Verify component compatibility before use
Inspect all components prior to use
Follow safe handling and manufacturer instructions
Ensure compliance with all applicable laws
Caliber: .223 Wylde
Barrel: KAK Industry 11.5" .223 Wylde Carbine Gas Government Profile Barrel
Barrel Material: 4140 CrMoV
Barrel Length: 11.5-inch
Barrel Twist Rate: 1:8
Barrel Thread Pitch: 1/2x28
Barrel Finish: Nitride
Barrel Profile: Government
Barrel Gas System Length: Carbine
Handguard: ACE-20 SERIES 10" MLOK FREEFLOAT HANDGUARD
Handguard Material: Aluminum
Handguard Color: Black
Handguard Style: M-LOK
Gas Block Size: 0.750
Gas Block: Micro Low-Profile Gas Block, .750 O.D Barrel Steel
Muzzle Device: AR-15 1/2x28 TPI GI Birdcage Flash Hider 5.56 .223 A2
Muzzle Thread Pitch: 1/2x28
Upper Receiver: AR-15 Upper Receiver, M4 Feed ramps, 7075 T6 Aluminum, Anodized
Upper Receiver Material: 7075 T6 Aluminum
Upper Receiver Finish: Anodized
Bolt Carrier: AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group
Bolt Carrier Material: 9310 Alloy Steel
Bolt Carrier Finish: Nitride
Charging Handle: AR-15 M4 Charging Handle Mil-Spec Quality
Pistol Brace Information: Magpul BTR Pistol Brace, Black, AR-15, for Standard Mil-Spec Buffer Tube
To view the most up-to-date shipping times Click HERE. To view Warranty, Returns, Terms & Restrictions Click HERE. To view State Restrictions Click HERE.